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[mirror_ubuntu-zesty-kernel.git] / drivers / video / fbdev / vt8623fb.c
1 /*
2 * linux/drivers/video/vt8623fb.c - fbdev driver for
3 * integrated graphic core in VIA VT8623 [CLE266] chipset
4 *
5 * Copyright (c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>
6 *
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file COPYING in the main directory of this archive for
9 * more details.
10 *
11 * Code is based on s3fb, some parts are from David Boucher's viafb
12 * (http://davesdomain.org.uk/viafb/)
13 */
14
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/string.h>
19 #include <linux/mm.h>
20 #include <linux/tty.h>
21 #include <linux/delay.h>
22 #include <linux/fb.h>
23 #include <linux/svga.h>
24 #include <linux/init.h>
25 #include <linux/pci.h>
26 #include <linux/console.h> /* Why should fb driver call console functions? because console_lock() */
27 #include <video/vga.h>
28
29 struct vt8623fb_info {
30 char __iomem *mmio_base;
31 int wc_cookie;
32 struct vgastate state;
33 struct mutex open_lock;
34 unsigned int ref_count;
35 u32 pseudo_palette[16];
36 };
37
38
39
40 /* ------------------------------------------------------------------------- */
41
42 static const struct svga_fb_format vt8623fb_formats[] = {
43 { 0, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
44 FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP8, FB_VISUAL_PSEUDOCOLOR, 16, 16},
45 { 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
46 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 16, 16},
47 { 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 1,
48 FB_TYPE_INTERLEAVED_PLANES, 1, FB_VISUAL_PSEUDOCOLOR, 16, 16},
49 { 8, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
50 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 8, 8},
51 /* {16, {10, 5, 0}, {5, 5, 0}, {0, 5, 0}, {0, 0, 0}, 0,
52 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 4, 4}, */
53 {16, {11, 5, 0}, {5, 6, 0}, {0, 5, 0}, {0, 0, 0}, 0,
54 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 4, 4},
55 {32, {16, 8, 0}, {8, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0,
56 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 2, 2},
57 SVGA_FORMAT_END
58 };
59
60 static const struct svga_pll vt8623_pll = {2, 127, 2, 7, 0, 3,
61 60000, 300000, 14318};
62
63 /* CRT timing register sets */
64
65 static struct vga_regset vt8623_h_total_regs[] = {{0x00, 0, 7}, {0x36, 3, 3}, VGA_REGSET_END};
66 static struct vga_regset vt8623_h_display_regs[] = {{0x01, 0, 7}, VGA_REGSET_END};
67 static struct vga_regset vt8623_h_blank_start_regs[] = {{0x02, 0, 7}, VGA_REGSET_END};
68 static struct vga_regset vt8623_h_blank_end_regs[] = {{0x03, 0, 4}, {0x05, 7, 7}, {0x33, 5, 5}, VGA_REGSET_END};
69 static struct vga_regset vt8623_h_sync_start_regs[] = {{0x04, 0, 7}, {0x33, 4, 4}, VGA_REGSET_END};
70 static struct vga_regset vt8623_h_sync_end_regs[] = {{0x05, 0, 4}, VGA_REGSET_END};
71
72 static struct vga_regset vt8623_v_total_regs[] = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x35, 0, 0}, VGA_REGSET_END};
73 static struct vga_regset vt8623_v_display_regs[] = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x35, 2, 2}, VGA_REGSET_END};
74 static struct vga_regset vt8623_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x35, 3, 3}, VGA_REGSET_END};
75 static struct vga_regset vt8623_v_blank_end_regs[] = {{0x16, 0, 7}, VGA_REGSET_END};
76 static struct vga_regset vt8623_v_sync_start_regs[] = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x35, 1, 1}, VGA_REGSET_END};
77 static struct vga_regset vt8623_v_sync_end_regs[] = {{0x11, 0, 3}, VGA_REGSET_END};
78
79 static struct vga_regset vt8623_offset_regs[] = {{0x13, 0, 7}, {0x35, 5, 7}, VGA_REGSET_END};
80 static struct vga_regset vt8623_line_compare_regs[] = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, {0x33, 0, 2}, {0x35, 4, 4}, VGA_REGSET_END};
81 static struct vga_regset vt8623_fetch_count_regs[] = {{0x1C, 0, 7}, {0x1D, 0, 1}, VGA_REGSET_END};
82 static struct vga_regset vt8623_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x34, 0, 7}, {0x48, 0, 1}, VGA_REGSET_END};
83
84 static struct svga_timing_regs vt8623_timing_regs = {
85 vt8623_h_total_regs, vt8623_h_display_regs, vt8623_h_blank_start_regs,
86 vt8623_h_blank_end_regs, vt8623_h_sync_start_regs, vt8623_h_sync_end_regs,
87 vt8623_v_total_regs, vt8623_v_display_regs, vt8623_v_blank_start_regs,
88 vt8623_v_blank_end_regs, vt8623_v_sync_start_regs, vt8623_v_sync_end_regs,
89 };
90
91
92 /* ------------------------------------------------------------------------- */
93
94
95 /* Module parameters */
96
97 static char *mode_option = "640x480-8@60";
98 static int mtrr = 1;
99
100 MODULE_AUTHOR("(c) 2006 Ondrej Zajicek <santiago@crfreenet.org>");
101 MODULE_LICENSE("GPL");
102 MODULE_DESCRIPTION("fbdev driver for integrated graphics core in VIA VT8623 [CLE266]");
103
104 module_param(mode_option, charp, 0644);
105 MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
106 module_param_named(mode, mode_option, charp, 0);
107 MODULE_PARM_DESC(mode, "Default video mode e.g. '648x480-8@60' (deprecated)");
108 module_param(mtrr, int, 0444);
109 MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
110
111
112 /* ------------------------------------------------------------------------- */
113
114 static void vt8623fb_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor)
115 {
116 struct vt8623fb_info *par = info->par;
117
118 svga_tilecursor(par->state.vgabase, info, cursor);
119 }
120
121 static struct fb_tile_ops vt8623fb_tile_ops = {
122 .fb_settile = svga_settile,
123 .fb_tilecopy = svga_tilecopy,
124 .fb_tilefill = svga_tilefill,
125 .fb_tileblit = svga_tileblit,
126 .fb_tilecursor = vt8623fb_tilecursor,
127 .fb_get_tilemax = svga_get_tilemax,
128 };
129
130
131 /* ------------------------------------------------------------------------- */
132
133
134 /* image data is MSB-first, fb structure is MSB-first too */
135 static inline u32 expand_color(u32 c)
136 {
137 return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
138 }
139
140 /* vt8623fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
141 static void vt8623fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
142 {
143 u32 fg = expand_color(image->fg_color);
144 u32 bg = expand_color(image->bg_color);
145 const u8 *src1, *src;
146 u8 __iomem *dst1;
147 u32 __iomem *dst;
148 u32 val;
149 int x, y;
150
151 src1 = image->data;
152 dst1 = info->screen_base + (image->dy * info->fix.line_length)
153 + ((image->dx / 8) * 4);
154
155 for (y = 0; y < image->height; y++) {
156 src = src1;
157 dst = (u32 __iomem *) dst1;
158 for (x = 0; x < image->width; x += 8) {
159 val = *(src++) * 0x01010101;
160 val = (val & fg) | (~val & bg);
161 fb_writel(val, dst++);
162 }
163 src1 += image->width / 8;
164 dst1 += info->fix.line_length;
165 }
166 }
167
168 /* vt8623fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
169 static void vt8623fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
170 {
171 u32 fg = expand_color(rect->color);
172 u8 __iomem *dst1;
173 u32 __iomem *dst;
174 int x, y;
175
176 dst1 = info->screen_base + (rect->dy * info->fix.line_length)
177 + ((rect->dx / 8) * 4);
178
179 for (y = 0; y < rect->height; y++) {
180 dst = (u32 __iomem *) dst1;
181 for (x = 0; x < rect->width; x += 8) {
182 fb_writel(fg, dst++);
183 }
184 dst1 += info->fix.line_length;
185 }
186 }
187
188
189 /* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
190 static inline u32 expand_pixel(u32 c)
191 {
192 return (((c & 1) << 24) | ((c & 2) << 27) | ((c & 4) << 14) | ((c & 8) << 17) |
193 ((c & 16) << 4) | ((c & 32) << 7) | ((c & 64) >> 6) | ((c & 128) >> 3)) * 0xF;
194 }
195
196 /* vt8623fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
197 static void vt8623fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
198 {
199 u32 fg = image->fg_color * 0x11111111;
200 u32 bg = image->bg_color * 0x11111111;
201 const u8 *src1, *src;
202 u8 __iomem *dst1;
203 u32 __iomem *dst;
204 u32 val;
205 int x, y;
206
207 src1 = image->data;
208 dst1 = info->screen_base + (image->dy * info->fix.line_length)
209 + ((image->dx / 8) * 4);
210
211 for (y = 0; y < image->height; y++) {
212 src = src1;
213 dst = (u32 __iomem *) dst1;
214 for (x = 0; x < image->width; x += 8) {
215 val = expand_pixel(*(src++));
216 val = (val & fg) | (~val & bg);
217 fb_writel(val, dst++);
218 }
219 src1 += image->width / 8;
220 dst1 += info->fix.line_length;
221 }
222 }
223
224 static void vt8623fb_imageblit(struct fb_info *info, const struct fb_image *image)
225 {
226 if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
227 && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
228 if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
229 vt8623fb_iplan_imageblit(info, image);
230 else
231 vt8623fb_cfb4_imageblit(info, image);
232 } else
233 cfb_imageblit(info, image);
234 }
235
236 static void vt8623fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
237 {
238 if ((info->var.bits_per_pixel == 4)
239 && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
240 && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
241 vt8623fb_iplan_fillrect(info, rect);
242 else
243 cfb_fillrect(info, rect);
244 }
245
246
247 /* ------------------------------------------------------------------------- */
248
249
250 static void vt8623_set_pixclock(struct fb_info *info, u32 pixclock)
251 {
252 struct vt8623fb_info *par = info->par;
253 u16 m, n, r;
254 u8 regval;
255 int rv;
256
257 rv = svga_compute_pll(&vt8623_pll, 1000000000 / pixclock, &m, &n, &r, info->node);
258 if (rv < 0) {
259 fb_err(info, "cannot set requested pixclock, keeping old value\n");
260 return;
261 }
262
263 /* Set VGA misc register */
264 regval = vga_r(par->state.vgabase, VGA_MIS_R);
265 vga_w(par->state.vgabase, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
266
267 /* Set clock registers */
268 vga_wseq(par->state.vgabase, 0x46, (n | (r << 6)));
269 vga_wseq(par->state.vgabase, 0x47, m);
270
271 udelay(1000);
272
273 /* PLL reset */
274 svga_wseq_mask(par->state.vgabase, 0x40, 0x02, 0x02);
275 svga_wseq_mask(par->state.vgabase, 0x40, 0x00, 0x02);
276 }
277
278
279 static int vt8623fb_open(struct fb_info *info, int user)
280 {
281 struct vt8623fb_info *par = info->par;
282
283 mutex_lock(&(par->open_lock));
284 if (par->ref_count == 0) {
285 void __iomem *vgabase = par->state.vgabase;
286
287 memset(&(par->state), 0, sizeof(struct vgastate));
288 par->state.vgabase = vgabase;
289 par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
290 par->state.num_crtc = 0xA2;
291 par->state.num_seq = 0x50;
292 save_vga(&(par->state));
293 }
294
295 par->ref_count++;
296 mutex_unlock(&(par->open_lock));
297
298 return 0;
299 }
300
301 static int vt8623fb_release(struct fb_info *info, int user)
302 {
303 struct vt8623fb_info *par = info->par;
304
305 mutex_lock(&(par->open_lock));
306 if (par->ref_count == 0) {
307 mutex_unlock(&(par->open_lock));
308 return -EINVAL;
309 }
310
311 if (par->ref_count == 1)
312 restore_vga(&(par->state));
313
314 par->ref_count--;
315 mutex_unlock(&(par->open_lock));
316
317 return 0;
318 }
319
320 static int vt8623fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
321 {
322 int rv, mem, step;
323
324 /* Find appropriate format */
325 rv = svga_match_format (vt8623fb_formats, var, NULL);
326 if (rv < 0)
327 {
328 fb_err(info, "unsupported mode requested\n");
329 return rv;
330 }
331
332 /* Do not allow to have real resoulution larger than virtual */
333 if (var->xres > var->xres_virtual)
334 var->xres_virtual = var->xres;
335
336 if (var->yres > var->yres_virtual)
337 var->yres_virtual = var->yres;
338
339 /* Round up xres_virtual to have proper alignment of lines */
340 step = vt8623fb_formats[rv].xresstep - 1;
341 var->xres_virtual = (var->xres_virtual+step) & ~step;
342
343 /* Check whether have enough memory */
344 mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
345 if (mem > info->screen_size)
346 {
347 fb_err(info, "not enough framebuffer memory (%d kB requested, %d kB available)\n",
348 mem >> 10, (unsigned int) (info->screen_size >> 10));
349 return -EINVAL;
350 }
351
352 /* Text mode is limited to 256 kB of memory */
353 if ((var->bits_per_pixel == 0) && (mem > (256*1024)))
354 {
355 fb_err(info, "text framebuffer size too large (%d kB requested, 256 kB possible)\n",
356 mem >> 10);
357 return -EINVAL;
358 }
359
360 rv = svga_check_timings (&vt8623_timing_regs, var, info->node);
361 if (rv < 0)
362 {
363 fb_err(info, "invalid timings requested\n");
364 return rv;
365 }
366
367 /* Interlaced mode not supported */
368 if (var->vmode & FB_VMODE_INTERLACED)
369 return -EINVAL;
370
371 return 0;
372 }
373
374
375 static int vt8623fb_set_par(struct fb_info *info)
376 {
377 u32 mode, offset_value, fetch_value, screen_size;
378 struct vt8623fb_info *par = info->par;
379 u32 bpp = info->var.bits_per_pixel;
380
381 if (bpp != 0) {
382 info->fix.ypanstep = 1;
383 info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
384
385 info->flags &= ~FBINFO_MISC_TILEBLITTING;
386 info->tileops = NULL;
387
388 /* in 4bpp supports 8p wide tiles only, any tiles otherwise */
389 info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
390 info->pixmap.blit_y = ~(u32)0;
391
392 offset_value = (info->var.xres_virtual * bpp) / 64;
393 fetch_value = ((info->var.xres * bpp) / 128) + 4;
394
395 if (bpp == 4)
396 fetch_value = (info->var.xres / 8) + 8; /* + 0 is OK */
397
398 screen_size = info->var.yres_virtual * info->fix.line_length;
399 } else {
400 info->fix.ypanstep = 16;
401 info->fix.line_length = 0;
402
403 info->flags |= FBINFO_MISC_TILEBLITTING;
404 info->tileops = &vt8623fb_tile_ops;
405
406 /* supports 8x16 tiles only */
407 info->pixmap.blit_x = 1 << (8 - 1);
408 info->pixmap.blit_y = 1 << (16 - 1);
409
410 offset_value = info->var.xres_virtual / 16;
411 fetch_value = (info->var.xres / 8) + 8;
412 screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;
413 }
414
415 info->var.xoffset = 0;
416 info->var.yoffset = 0;
417 info->var.activate = FB_ACTIVATE_NOW;
418
419 /* Unlock registers */
420 svga_wseq_mask(par->state.vgabase, 0x10, 0x01, 0x01);
421 svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x80);
422 svga_wcrt_mask(par->state.vgabase, 0x47, 0x00, 0x01);
423
424 /* Device, screen and sync off */
425 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
426 svga_wcrt_mask(par->state.vgabase, 0x36, 0x30, 0x30);
427 svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80);
428
429 /* Set default values */
430 svga_set_default_gfx_regs(par->state.vgabase);
431 svga_set_default_atc_regs(par->state.vgabase);
432 svga_set_default_seq_regs(par->state.vgabase);
433 svga_set_default_crt_regs(par->state.vgabase);
434 svga_wcrt_multi(par->state.vgabase, vt8623_line_compare_regs, 0xFFFFFFFF);
435 svga_wcrt_multi(par->state.vgabase, vt8623_start_address_regs, 0);
436
437 svga_wcrt_multi(par->state.vgabase, vt8623_offset_regs, offset_value);
438 svga_wseq_multi(par->state.vgabase, vt8623_fetch_count_regs, fetch_value);
439
440 /* Clear H/V Skew */
441 svga_wcrt_mask(par->state.vgabase, 0x03, 0x00, 0x60);
442 svga_wcrt_mask(par->state.vgabase, 0x05, 0x00, 0x60);
443
444 if (info->var.vmode & FB_VMODE_DOUBLE)
445 svga_wcrt_mask(par->state.vgabase, 0x09, 0x80, 0x80);
446 else
447 svga_wcrt_mask(par->state.vgabase, 0x09, 0x00, 0x80);
448
449 svga_wseq_mask(par->state.vgabase, 0x1E, 0xF0, 0xF0); // DI/DVP bus
450 svga_wseq_mask(par->state.vgabase, 0x2A, 0x0F, 0x0F); // DI/DVP bus
451 svga_wseq_mask(par->state.vgabase, 0x16, 0x08, 0xBF); // FIFO read threshold
452 vga_wseq(par->state.vgabase, 0x17, 0x1F); // FIFO depth
453 vga_wseq(par->state.vgabase, 0x18, 0x4E);
454 svga_wseq_mask(par->state.vgabase, 0x1A, 0x08, 0x08); // enable MMIO ?
455
456 vga_wcrt(par->state.vgabase, 0x32, 0x00);
457 vga_wcrt(par->state.vgabase, 0x34, 0x00);
458 vga_wcrt(par->state.vgabase, 0x6A, 0x80);
459 vga_wcrt(par->state.vgabase, 0x6A, 0xC0);
460
461 vga_wgfx(par->state.vgabase, 0x20, 0x00);
462 vga_wgfx(par->state.vgabase, 0x21, 0x00);
463 vga_wgfx(par->state.vgabase, 0x22, 0x00);
464
465 /* Set SR15 according to number of bits per pixel */
466 mode = svga_match_format(vt8623fb_formats, &(info->var), &(info->fix));
467 switch (mode) {
468 case 0:
469 fb_dbg(info, "text mode\n");
470 svga_set_textmode_vga_regs(par->state.vgabase);
471 svga_wseq_mask(par->state.vgabase, 0x15, 0x00, 0xFE);
472 svga_wcrt_mask(par->state.vgabase, 0x11, 0x60, 0x70);
473 break;
474 case 1:
475 fb_dbg(info, "4 bit pseudocolor\n");
476 vga_wgfx(par->state.vgabase, VGA_GFX_MODE, 0x40);
477 svga_wseq_mask(par->state.vgabase, 0x15, 0x20, 0xFE);
478 svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x70);
479 break;
480 case 2:
481 fb_dbg(info, "4 bit pseudocolor, planar\n");
482 svga_wseq_mask(par->state.vgabase, 0x15, 0x00, 0xFE);
483 svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x70);
484 break;
485 case 3:
486 fb_dbg(info, "8 bit pseudocolor\n");
487 svga_wseq_mask(par->state.vgabase, 0x15, 0x22, 0xFE);
488 break;
489 case 4:
490 fb_dbg(info, "5/6/5 truecolor\n");
491 svga_wseq_mask(par->state.vgabase, 0x15, 0xB6, 0xFE);
492 break;
493 case 5:
494 fb_dbg(info, "8/8/8 truecolor\n");
495 svga_wseq_mask(par->state.vgabase, 0x15, 0xAE, 0xFE);
496 break;
497 default:
498 printk(KERN_ERR "vt8623fb: unsupported mode - bug\n");
499 return (-EINVAL);
500 }
501
502 vt8623_set_pixclock(info, info->var.pixclock);
503 svga_set_timings(par->state.vgabase, &vt8623_timing_regs, &(info->var), 1, 1,
504 (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1,
505 1, info->node);
506
507 memset_io(info->screen_base, 0x00, screen_size);
508
509 /* Device and screen back on */
510 svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
511 svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
512 svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
513
514 return 0;
515 }
516
517
518 static int vt8623fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
519 u_int transp, struct fb_info *fb)
520 {
521 switch (fb->var.bits_per_pixel) {
522 case 0:
523 case 4:
524 if (regno >= 16)
525 return -EINVAL;
526
527 outb(0x0F, VGA_PEL_MSK);
528 outb(regno, VGA_PEL_IW);
529 outb(red >> 10, VGA_PEL_D);
530 outb(green >> 10, VGA_PEL_D);
531 outb(blue >> 10, VGA_PEL_D);
532 break;
533 case 8:
534 if (regno >= 256)
535 return -EINVAL;
536
537 outb(0xFF, VGA_PEL_MSK);
538 outb(regno, VGA_PEL_IW);
539 outb(red >> 10, VGA_PEL_D);
540 outb(green >> 10, VGA_PEL_D);
541 outb(blue >> 10, VGA_PEL_D);
542 break;
543 case 16:
544 if (regno >= 16)
545 return 0;
546
547 if (fb->var.green.length == 5)
548 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
549 ((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
550 else if (fb->var.green.length == 6)
551 ((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
552 ((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
553 else
554 return -EINVAL;
555 break;
556 case 24:
557 case 32:
558 if (regno >= 16)
559 return 0;
560
561 /* ((transp & 0xFF00) << 16) */
562 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
563 (green & 0xFF00) | ((blue & 0xFF00) >> 8);
564 break;
565 default:
566 return -EINVAL;
567 }
568
569 return 0;
570 }
571
572
573 static int vt8623fb_blank(int blank_mode, struct fb_info *info)
574 {
575 struct vt8623fb_info *par = info->par;
576
577 switch (blank_mode) {
578 case FB_BLANK_UNBLANK:
579 fb_dbg(info, "unblank\n");
580 svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
581 svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
582 break;
583 case FB_BLANK_NORMAL:
584 fb_dbg(info, "blank\n");
585 svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
586 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
587 break;
588 case FB_BLANK_HSYNC_SUSPEND:
589 fb_dbg(info, "DPMS standby (hsync off)\n");
590 svga_wcrt_mask(par->state.vgabase, 0x36, 0x10, 0x30);
591 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
592 break;
593 case FB_BLANK_VSYNC_SUSPEND:
594 fb_dbg(info, "DPMS suspend (vsync off)\n");
595 svga_wcrt_mask(par->state.vgabase, 0x36, 0x20, 0x30);
596 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
597 break;
598 case FB_BLANK_POWERDOWN:
599 fb_dbg(info, "DPMS off (no sync)\n");
600 svga_wcrt_mask(par->state.vgabase, 0x36, 0x30, 0x30);
601 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
602 break;
603 }
604
605 return 0;
606 }
607
608
609 static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
610 {
611 struct vt8623fb_info *par = info->par;
612 unsigned int offset;
613
614 /* Calculate the offset */
615 if (info->var.bits_per_pixel == 0) {
616 offset = (var->yoffset / 16) * info->var.xres_virtual
617 + var->xoffset;
618 offset = offset >> 3;
619 } else {
620 offset = (var->yoffset * info->fix.line_length) +
621 (var->xoffset * info->var.bits_per_pixel / 8);
622 offset = offset >> ((info->var.bits_per_pixel == 4) ? 2 : 1);
623 }
624
625 /* Set the offset */
626 svga_wcrt_multi(par->state.vgabase, vt8623_start_address_regs, offset);
627
628 return 0;
629 }
630
631
632 /* ------------------------------------------------------------------------- */
633
634
635 /* Frame buffer operations */
636
637 static struct fb_ops vt8623fb_ops = {
638 .owner = THIS_MODULE,
639 .fb_open = vt8623fb_open,
640 .fb_release = vt8623fb_release,
641 .fb_check_var = vt8623fb_check_var,
642 .fb_set_par = vt8623fb_set_par,
643 .fb_setcolreg = vt8623fb_setcolreg,
644 .fb_blank = vt8623fb_blank,
645 .fb_pan_display = vt8623fb_pan_display,
646 .fb_fillrect = vt8623fb_fillrect,
647 .fb_copyarea = cfb_copyarea,
648 .fb_imageblit = vt8623fb_imageblit,
649 .fb_get_caps = svga_get_caps,
650 };
651
652
653 /* PCI probe */
654
655 static int vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
656 {
657 struct pci_bus_region bus_reg;
658 struct resource vga_res;
659 struct fb_info *info;
660 struct vt8623fb_info *par;
661 unsigned int memsize1, memsize2;
662 int rc;
663
664 /* Ignore secondary VGA device because there is no VGA arbitration */
665 if (! svga_primary_device(dev)) {
666 dev_info(&(dev->dev), "ignoring secondary device\n");
667 return -ENODEV;
668 }
669
670 /* Allocate and fill driver data structure */
671 info = framebuffer_alloc(sizeof(struct vt8623fb_info), &(dev->dev));
672 if (! info) {
673 dev_err(&(dev->dev), "cannot allocate memory\n");
674 return -ENOMEM;
675 }
676
677 par = info->par;
678 mutex_init(&par->open_lock);
679
680 info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
681 info->fbops = &vt8623fb_ops;
682
683 /* Prepare PCI device */
684
685 rc = pci_enable_device(dev);
686 if (rc < 0) {
687 dev_err(info->device, "cannot enable PCI device\n");
688 goto err_enable_device;
689 }
690
691 rc = pci_request_regions(dev, "vt8623fb");
692 if (rc < 0) {
693 dev_err(info->device, "cannot reserve framebuffer region\n");
694 goto err_request_regions;
695 }
696
697 info->fix.smem_start = pci_resource_start(dev, 0);
698 info->fix.smem_len = pci_resource_len(dev, 0);
699 info->fix.mmio_start = pci_resource_start(dev, 1);
700 info->fix.mmio_len = pci_resource_len(dev, 1);
701
702 /* Map physical IO memory address into kernel space */
703 info->screen_base = pci_iomap_wc(dev, 0, 0);
704 if (! info->screen_base) {
705 rc = -ENOMEM;
706 dev_err(info->device, "iomap for framebuffer failed\n");
707 goto err_iomap_1;
708 }
709
710 par->mmio_base = pci_iomap(dev, 1, 0);
711 if (! par->mmio_base) {
712 rc = -ENOMEM;
713 dev_err(info->device, "iomap for MMIO failed\n");
714 goto err_iomap_2;
715 }
716
717 bus_reg.start = 0;
718 bus_reg.end = 64 * 1024;
719
720 vga_res.flags = IORESOURCE_IO;
721
722 pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg);
723
724 par->state.vgabase = (void __iomem *) (unsigned long) vga_res.start;
725
726 /* Find how many physical memory there is on card */
727 memsize1 = (vga_rseq(par->state.vgabase, 0x34) + 1) >> 1;
728 memsize2 = vga_rseq(par->state.vgabase, 0x39) << 2;
729
730 if ((16 <= memsize1) && (memsize1 <= 64) && (memsize1 == memsize2))
731 info->screen_size = memsize1 << 20;
732 else {
733 dev_err(info->device, "memory size detection failed (%x %x), suppose 16 MB\n", memsize1, memsize2);
734 info->screen_size = 16 << 20;
735 }
736
737 info->fix.smem_len = info->screen_size;
738 strcpy(info->fix.id, "VIA VT8623");
739 info->fix.type = FB_TYPE_PACKED_PIXELS;
740 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
741 info->fix.ypanstep = 0;
742 info->fix.accel = FB_ACCEL_NONE;
743 info->pseudo_palette = (void*)par->pseudo_palette;
744
745 /* Prepare startup mode */
746
747 kernel_param_lock(THIS_MODULE);
748 rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
749 kernel_param_unlock(THIS_MODULE);
750 if (! ((rc == 1) || (rc == 2))) {
751 rc = -EINVAL;
752 dev_err(info->device, "mode %s not found\n", mode_option);
753 goto err_find_mode;
754 }
755
756 rc = fb_alloc_cmap(&info->cmap, 256, 0);
757 if (rc < 0) {
758 dev_err(info->device, "cannot allocate colormap\n");
759 goto err_alloc_cmap;
760 }
761
762 rc = register_framebuffer(info);
763 if (rc < 0) {
764 dev_err(info->device, "cannot register framebuffer\n");
765 goto err_reg_fb;
766 }
767
768 fb_info(info, "%s on %s, %d MB RAM\n",
769 info->fix.id, pci_name(dev), info->fix.smem_len >> 20);
770
771 /* Record a reference to the driver data */
772 pci_set_drvdata(dev, info);
773
774 if (mtrr)
775 par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
776 info->fix.smem_len);
777
778 return 0;
779
780 /* Error handling */
781 err_reg_fb:
782 fb_dealloc_cmap(&info->cmap);
783 err_alloc_cmap:
784 err_find_mode:
785 pci_iounmap(dev, par->mmio_base);
786 err_iomap_2:
787 pci_iounmap(dev, info->screen_base);
788 err_iomap_1:
789 pci_release_regions(dev);
790 err_request_regions:
791 /* pci_disable_device(dev); */
792 err_enable_device:
793 framebuffer_release(info);
794 return rc;
795 }
796
797 /* PCI remove */
798
799 static void vt8623_pci_remove(struct pci_dev *dev)
800 {
801 struct fb_info *info = pci_get_drvdata(dev);
802
803 if (info) {
804 struct vt8623fb_info *par = info->par;
805
806 arch_phys_wc_del(par->wc_cookie);
807 unregister_framebuffer(info);
808 fb_dealloc_cmap(&info->cmap);
809
810 pci_iounmap(dev, info->screen_base);
811 pci_iounmap(dev, par->mmio_base);
812 pci_release_regions(dev);
813 /* pci_disable_device(dev); */
814
815 framebuffer_release(info);
816 }
817 }
818
819
820 #ifdef CONFIG_PM
821 /* PCI suspend */
822
823 static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state)
824 {
825 struct fb_info *info = pci_get_drvdata(dev);
826 struct vt8623fb_info *par = info->par;
827
828 dev_info(info->device, "suspend\n");
829
830 console_lock();
831 mutex_lock(&(par->open_lock));
832
833 if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
834 mutex_unlock(&(par->open_lock));
835 console_unlock();
836 return 0;
837 }
838
839 fb_set_suspend(info, 1);
840
841 pci_save_state(dev);
842 pci_disable_device(dev);
843 pci_set_power_state(dev, pci_choose_state(dev, state));
844
845 mutex_unlock(&(par->open_lock));
846 console_unlock();
847
848 return 0;
849 }
850
851
852 /* PCI resume */
853
854 static int vt8623_pci_resume(struct pci_dev* dev)
855 {
856 struct fb_info *info = pci_get_drvdata(dev);
857 struct vt8623fb_info *par = info->par;
858
859 dev_info(info->device, "resume\n");
860
861 console_lock();
862 mutex_lock(&(par->open_lock));
863
864 if (par->ref_count == 0)
865 goto fail;
866
867 pci_set_power_state(dev, PCI_D0);
868 pci_restore_state(dev);
869
870 if (pci_enable_device(dev))
871 goto fail;
872
873 pci_set_master(dev);
874
875 vt8623fb_set_par(info);
876 fb_set_suspend(info, 0);
877
878 fail:
879 mutex_unlock(&(par->open_lock));
880 console_unlock();
881
882 return 0;
883 }
884 #else
885 #define vt8623_pci_suspend NULL
886 #define vt8623_pci_resume NULL
887 #endif /* CONFIG_PM */
888
889 /* List of boards that we are trying to support */
890
891 static struct pci_device_id vt8623_devices[] = {
892 {PCI_DEVICE(PCI_VENDOR_ID_VIA, 0x3122)},
893 {0, 0, 0, 0, 0, 0, 0}
894 };
895
896 MODULE_DEVICE_TABLE(pci, vt8623_devices);
897
898 static struct pci_driver vt8623fb_pci_driver = {
899 .name = "vt8623fb",
900 .id_table = vt8623_devices,
901 .probe = vt8623_pci_probe,
902 .remove = vt8623_pci_remove,
903 .suspend = vt8623_pci_suspend,
904 .resume = vt8623_pci_resume,
905 };
906
907 /* Cleanup */
908
909 static void __exit vt8623fb_cleanup(void)
910 {
911 pr_debug("vt8623fb: cleaning up\n");
912 pci_unregister_driver(&vt8623fb_pci_driver);
913 }
914
915 /* Driver Initialisation */
916
917 static int __init vt8623fb_init(void)
918 {
919
920 #ifndef MODULE
921 char *option = NULL;
922
923 if (fb_get_options("vt8623fb", &option))
924 return -ENODEV;
925
926 if (option && *option)
927 mode_option = option;
928 #endif
929
930 pr_debug("vt8623fb: initializing\n");
931 return pci_register_driver(&vt8623fb_pci_driver);
932 }
933
934 /* ------------------------------------------------------------------------- */
935
936 /* Modularization */
937
938 module_init(vt8623fb_init);
939 module_exit(vt8623fb_cleanup);
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